@Maro.Kyo
If you don't mind me asking, what blogs (or any website for that matter) do you use as sources? South Korea is looking to be a fairly large player in defense, but I can barely find any credible books or websites on S. Korean projects or the S. Korean defense industry, in general.
It depends on what you are looking for. For example there's this blog (blog.naver.com/jhst3103) of my internet friend, who's mainly focused in technicalities. He regularly visits defense technology related seminars and makes one of the most up-to-date and in-depth coverages about Korean defense programs and its technologies. Though since last year or a year before that he started to put things behind paywall ($5 a month) due to being plagiarized multiple times, even by established media outlets. His blog now only covers the content outline for what he has uploaded behind the paywall. Other than him there are also various other sources as well, such as (
https://blog.naver.com/seaseadam), another internet friend of mine who mainly focuses in armored vehicles and naval weaponry. Other than him there is also (
https://blog.naver.com/yanagi0221) for example, and many other blogs and Korean forums, of which I can't recall the URLs at the moment but are very in depth in what they are interested in.
Other than the blogs, I usually use Korean academic libraries (well, not only for Korean military matters but for general military matters I use academic DBs like Springer, Wiley, Semantic Scholar, SPIE, IEEE, Research Gate, JSTOR, etc. They are a mountain of treasure for military and aviation enthusiasts as well) like Scienceon (
https://scienceon.kisti.re.kr/main/mainForm.do), KCI (
https://www.kci.go.kr/kciportal/main.kci), Korea Science (
https://koreascience.kr/main.page?&lang=ko). There you could find various documents, most of the times either by the researchers of defence companies or by the professors of university faculties which collaborates with defence firms in military programmes. For instance a lot of details regarding the T-50 variants' design or technologies that went into K-2, as well as a lot of other military projects could be found in these DBs. The websites of defence companies themselves also contain a lot of interesting topics, for example you could visit Hanwha Systems' homepage if you want to know some details about their avionics products. Companies like KAI also publish magazines on regular basis which often contains interesting information as well.
When we take a step away and talk about the bureaucracy regarding these programmes, I usually look up for MoD, DAPA and Korean parliament documents, especially the National Defense Committee proceedings and MoD budget requests which are all in public domain and are readily available, similar to GAO or CRS reports and DOT&E, SAR and various other documents for US programs.
With regards to a grander military matters like national strategy and warfare researches, I search for analysis/reports from Korean think tanks, as well as research reports from service branches concerning topics of interest.
Anyways, those are my sources of information and it's quite diverse, I should say. Most of them are first hand sources but I enjoy looking up for secondary sources like those blogs I've mentioned above, as long as I am aware of their ways of research and credibility of their content.
The biggest problem for non-Korean speakers like you would obviously be that all of these sources are in Korean and rarely contain English keywords to search for. Add to that the translators out there as of now are not very reliable when you translate any Western language into East Asian language, especially when it comes to searching for military matters.